orL'Hospital's rulenounEtymology: Guillaume de l'Hôpital died 1704 French mathematicianDate: 1944
a theorem in calculus: if at a given point two functions have an infinite limit or zero as a limit and are both differentiable in a neighborhood of this point then the limit of the quotient of the functions is equal to the limit of the quotient of their derivatives provided that this limit exists

L'Hôpital's rule — Procedure of differential calculus for evaluating indeterminate forms such as 0/0 and ∞/∞ when they result from attempting to find a limit. It states that when the limit of f(x)/g(x) is indeterminate, under certain conditions it can be obtained… … Universalium

L'Hôpital , Marquis Guillaume François Antoine de — (1661–1704) French mathematician L Hôpital, a Parisian by birth, began his career as a cavalry officer. However, he was forced to resign because of his short sightedness and devoted the rest of his life to mathematical study and research. To this … Scientists

Guillaume de l'Hôpital — Guillaume François Antoine, Marquis de l Hôpital (1661 ndash; February 2, 1704) was a French mathematician. He is perhaps best known for the rule which bears his name for calculating the limiting value of a fraction whose numerator and… … Wikipedia